1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_UDF_SB_H
3 #define __LINUX_UDF_SB_H
4
5 #include <linux/mutex.h>
6 #include <linux/bitops.h>
7 #include <linux/magic.h>
8
9 /*
10 * Even UDF 2.6 media should have version <= 0x250 but apparently there are
11 * some broken filesystems with version set to 0x260. Accommodate those.
12 */
13 #define UDF_MAX_READ_VERSION 0x0260
14 #define UDF_MAX_WRITE_VERSION 0x0201
15
16 #define UDF_FLAG_USE_EXTENDED_FE 0
17 #define UDF_VERS_USE_EXTENDED_FE 0x0200
18 #define UDF_FLAG_USE_STREAMS 1
19 #define UDF_VERS_USE_STREAMS 0x0200
20 #define UDF_FLAG_USE_SHORT_AD 2
21 #define UDF_FLAG_USE_AD_IN_ICB 3
22 #define UDF_FLAG_USE_FILE_CTIME_EA 4
23 #define UDF_FLAG_STRICT 5
24 #define UDF_FLAG_UNDELETE 6
25 #define UDF_FLAG_UNHIDE 7
26 #define UDF_FLAG_NOVRS 8
27 #define UDF_FLAG_UID_FORGET 11 /* save -1 for uid to disk */
28 #define UDF_FLAG_GID_FORGET 12
29 #define UDF_FLAG_UID_SET 13
30 #define UDF_FLAG_GID_SET 14
31 #define UDF_FLAG_SESSION_SET 15
32 #define UDF_FLAG_LASTBLOCK_SET 16
33 #define UDF_FLAG_BLOCKSIZE_SET 17
34 #define UDF_FLAG_INCONSISTENT 18
35 #define UDF_FLAG_RW_INCOMPAT 19 /* Set when we find RW incompatible
36 * feature */
37
38 #define UDF_PART_FLAG_UNALLOC_BITMAP 0x0001
39 #define UDF_PART_FLAG_UNALLOC_TABLE 0x0002
40 #define UDF_PART_FLAG_READ_ONLY 0x0010
41 #define UDF_PART_FLAG_WRITE_ONCE 0x0020
42 #define UDF_PART_FLAG_REWRITABLE 0x0040
43 #define UDF_PART_FLAG_OVERWRITABLE 0x0080
44
45 #define UDF_MAX_BLOCK_LOADED 8
46
47 #define UDF_TYPE1_MAP15 0x1511U
48 #define UDF_VIRTUAL_MAP15 0x1512U
49 #define UDF_VIRTUAL_MAP20 0x2012U
50 #define UDF_SPARABLE_MAP15 0x1522U
51 #define UDF_METADATA_MAP25 0x2511U
52
53 #define UDF_INVALID_MODE ((umode_t)-1)
54
55 #define MF_DUPLICATE_MD 0x01
56 #define MF_MIRROR_FE_LOADED 0x02
57
58 #define EFSCORRUPTED EUCLEAN
59
60 struct udf_meta_data {
61 __u32 s_meta_file_loc;
62 __u32 s_mirror_file_loc;
63 __u32 s_bitmap_file_loc;
64 __u32 s_alloc_unit_size;
65 __u16 s_align_unit_size;
66 /*
67 * Partition Reference Number of the associated physical / sparable
68 * partition
69 */
70 __u16 s_phys_partition_ref;
71 int s_flags;
72 struct inode *s_metadata_fe;
73 struct inode *s_mirror_fe;
74 struct inode *s_bitmap_fe;
75 };
76
77 struct udf_sparing_data {
78 __u16 s_packet_len;
79 struct buffer_head *s_spar_map[4];
80 };
81
82 struct udf_virtual_data {
83 __u32 s_num_entries;
84 __u16 s_start_offset;
85 };
86
87 struct udf_bitmap {
88 __u32 s_extPosition;
89 int s_nr_groups;
90 struct buffer_head *s_block_bitmap[] __counted_by(s_nr_groups);
91 };
92
93 struct udf_part_map {
94 union {
95 struct udf_bitmap *s_bitmap;
96 struct inode *s_table;
97 } s_uspace;
98 __u32 s_partition_root;
99 __u32 s_partition_len;
100 __u16 s_partition_type;
101 __u16 s_partition_num;
102 union {
103 struct udf_sparing_data s_sparing;
104 struct udf_virtual_data s_virtual;
105 struct udf_meta_data s_metadata;
106 } s_type_specific;
107 __u32 (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
108 __u16 s_volumeseqnum;
109 __u16 s_partition_flags;
110 };
111
112 #pragma pack()
113
114 struct udf_sb_info {
115 struct udf_part_map *s_partmaps;
116 __u8 s_volume_ident[32];
117
118 /* Overall info */
119 __u16 s_partitions;
120 __u16 s_partition;
121
122 /* Sector headers */
123 __s32 s_session;
124 __u32 s_anchor;
125 __u32 s_last_block;
126
127 struct buffer_head *s_lvid_bh;
128
129 /* Default permissions */
130 umode_t s_umask;
131 kgid_t s_gid;
132 kuid_t s_uid;
133 umode_t s_fmode;
134 umode_t s_dmode;
135 /* Lock protecting consistency of above permission settings */
136 rwlock_t s_cred_lock;
137
138 /* Root Info */
139 struct timespec64 s_record_time;
140
141 /* Fileset Info */
142 __u16 s_serial_number;
143
144 /* highest UDF revision we have recorded to this media */
145 __u16 s_udfrev;
146
147 /* Miscellaneous flags */
148 unsigned long s_flags;
149
150 /* Encoding info */
151 struct nls_table *s_nls_map;
152
153 /* VAT inode */
154 struct inode *s_vat_inode;
155
156 struct mutex s_alloc_mutex;
157 /* Protected by s_alloc_mutex */
158 unsigned int s_lvid_dirty;
159 };
160
161 static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
162 {
163 return sb->s_fs_info;
164 }
165
166 struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
167
168 int udf_compute_nr_groups(struct super_block *sb, u32 partition);
169
170 static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
171 {
172 return test_bit(flag, &UDF_SB(sb)->s_flags);
173 }
174
175 static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
176 {
177 set_bit(flag, &UDF_SB(sb)->s_flags);
178 }
179
180 static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
181 {
182 clear_bit(flag, &UDF_SB(sb)->s_flags);
183 }
184
185 #endif /* __LINUX_UDF_SB_H */
186
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